68 SPRING FLORA 



4. C. platycarpa (Torr.) Jones. (L. platycarpum (Torr.) C. 

 & R; L triternatum platycarpum Torr; Peucedanum simplex 

 Nutt.) Acaulescent or caulescent; often tall and stout; from 

 more or less thickened roots. Leaves 1-2 ternate, with leaflets 

 from narrowly linear to linear-lanceolate. Peduncles usually 

 slender, not swollen at the top, bearing an unequally 3-15- 

 rayed umbel of yellow flowers. Involucels of setaceous or 

 lanceolate bractlets. Fruit broadly elliptical to nearly round, 

 with large oil-tubes solitary in the intervals; wings broader 

 than the body. Dry gravelly plains. April-May. 



5. C. millefolia (Wats.) Jones. (C. Grayi C. & R. ; L. Grayi 

 C. & R.) Glabrous throughout, from very long, woody, cylin- 

 drical roots; strongly scented with the odor of celery-seed. 

 Leaves ternate. then pinnately-decompound into linear-filiform 

 and cuspidate divisions. Umbel rather equally 6.-16-rayed, with 

 involucels of distinct linear subulate bractlets. Flowers yel- 

 low. Fruit oblong. Oil-tubes solitary in the intervals. Among 

 rocks on sunny mountain summits. April-May. 



6. C. bicolor (Wats.) Jones. (L. bicolor (Wats.) C. & R.) 

 Nearly acaulescent or with a stem 4-18 inches high. Leaves 

 with much dilated petioles; ternate, with tripinnate divisions, 

 the ultimate segments filiform. Umbel very unequally 2-10- 

 rayed, with involucels. Flowers yellow on short pedicels. 

 Fruit glabrous; broadly linear at first, but becoming narrowly 

 elliptical when fully mature; wings very narrow in immature 

 fruit, but becoming wide and conspicuous in age. Oil-tubes 

 large and solitary in the intervals. Dry grassy mountain 

 slopes. May. 



6. ATJI.OSPERMUM. (Cymopteris in part). Indian Parsnip. 



Low perennials from a thick root; caulescent or acaules- 

 cent. Leaves ternate or more or less pinnately dissected. 

 Umbel usually without involucre; umbellets with small and 

 narrow bractlets. Flowers white, yellow or purple. Calyx- 

 teeth evident. Carpels with 3-5 usually broad, thin -wings. 

 Stylopodium none. Fruit glabrous; elliptical or round; more 

 or less laterally flattened. Oil-tubes usually several in each 

 interval. Seed usually sulcate. 



Flowers yellow (or a few of them purple) 1. A. longipcs 



Flowers white or cream-color (or a few purplish) 2. A. ibapense 



1. A. Icmgipes (Wats.) C. & R. (Cymopteris longipes Wat- 

 son). Glabrous and glaucous; apparently acaulescent when in 

 flower, but the cluster of pinnate or bipinnate leaves at length 

 borne at the summit of an elongated stem, which is sheathed 

 at the base. Umbels 5-10-rayed, without involucre but with 

 subulate bractlets. Oil-tubes 3 in the intervals. On dry, 

 sunny hills in gravelly soil. March-May. 



2. A. ibapense (Jones) C. & R. (C. ibapense Jones.) Leaves 

 tripinnate, their ultimate divisions crowded and obtuse with 

 revolute margins. Umbels 6-8-rayed; without involucre but 

 with involucels of linear bractlets. Oil-tubes 3 in the intervals. 

 Same habitat as the preceding, but mostly at higher elevations. 



7. OROGENIA. 



Stems scape-like. Leaves 1-3 ternate. Involucre none; in- 

 volucels of few linear bractlets. Flowers white. Calyx-teeth 

 minute. Stylopodium depressed. Fruit oblong, slightly flat- 

 tened dorsally. Oil-tubes minute; 3 in the intervals. Seed-face 

 slightly concave. 



